Re: [Discuss-gnuradio] HELP! - Problem with radio application deploy

[Tom Rondeau]

On Tue, Nov 19, 2013 at 6:35 PM, Paul B. Huter <address@hidden> wrote:
> I am trying to deploy my radio application (using GRC), and I am running
> into a problem. I am sampling at 50MHz and trying to pare things down to
> 30MHz using a Low Pass Filter, defined as follows:
>
> Decimation = 50
> Gain = 1
> Sample Rate = samp_rate (50M)
> Cutoff Freq = 30000000 (30M)
> Transition Width = 1000 (1k)
>
> I get an error telling me cutoff frequency is greater than sample rate / 2
> (30 > 50/2).
>
> How can I get down to 30MHz? I do intend to look at smaller "chunks" of data
> at a time, so I am perfectly okay with taking data at 50MHz and cutting it
> down later, I just wanted to avoid gather unnecessary data.
>
> Thanks!

Set the cutoff freq to 15M, not 30M.

Tom